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          SPA&MVVM两种设计模式思想简单分析
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<h1 id="SPA"><a href="#SPA" class="headerlink" title="SPA"></a>SPA</h1><h2 id="名称由来"><a href="#名称由来" class="headerlink" title="名称由来"></a>名称由来</h2><p>single pages application 单页应用程序</p>
<a id="more"></a>
<h2 id="意义"><a href="#意义" class="headerlink" title="意义"></a>意义</h2><p>spa即将页面所有活动局限在一个页面上，称为主页。在一般的页面上想要改变现实内容都是重新请求一个document，但是spa设计的页面上是通过JS操作DOM来改变页面内容的，即spa不会去重新请求一个document。</p>
<h2 id="应用上"><a href="#应用上" class="headerlink" title="应用上"></a>应用上</h2><p>微信小程序，vue等都是SPA。</p>
<h1 id="MVVM"><a href="#MVVM" class="headerlink" title="MVVM"></a>MVVM</h1><h2 id="名称由来-1"><a href="#名称由来-1" class="headerlink" title="名称由来"></a>名称由来</h2><p>model-view-viewmodel 模型-视图-视图模型</p>
<h2 id="核心思想"><a href="#核心思想" class="headerlink" title="核心思想"></a>核心思想</h2><p>让开发者只需要关心model和view这两块，而不用去花大量时间关心页面和数据的关系<br>vue是实现了mvvm设计思想的框架！</p>
<h2 id="代码示意"><a href="#代码示意" class="headerlink" title="代码示意"></a>代码示意</h2><figure class="highlight html"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br></pre></td><td class="code"><pre><span class="line"><span class="meta">&lt;!DOCTYPE <span class="meta-keyword">html</span>&gt;</span></span><br><span class="line"><span class="tag">&lt;<span class="name">html</span> <span class="attr">lang</span>=<span class="string">"en"</span>&gt;</span></span><br><span class="line"><span class="tag">&lt;<span class="name">head</span>&gt;</span></span><br><span class="line">	<span class="tag">&lt;<span class="name">meta</span> <span class="attr">charset</span>=<span class="string">"UTF-8"</span>&gt;</span></span><br><span class="line">	<span class="tag">&lt;<span class="name">title</span>&gt;</span>Document<span class="tag">&lt;/<span class="name">title</span>&gt;</span></span><br><span class="line">	<span class="tag">&lt;<span class="name">script</span>&gt;</span></span><br><span class="line"><span class="actionscript">		<span class="comment">// model 页面内容的相关数据</span></span></span><br><span class="line"><span class="actionscript">		<span class="keyword">var</span> msg=<span class="string">"msg11"</span>;</span></span><br><span class="line"></span><br><span class="line"><span class="actionscript">		<span class="comment">// view-model MVVM设计的核心思想，是连接view和model的桥梁</span></span></span><br><span class="line"><span class="javascript">		<span class="built_in">window</span>.onload=<span class="function"><span class="keyword">function</span>(<span class="params"></span>)</span>&#123;</span></span><br><span class="line"><span class="javascript">			<span class="keyword">var</span> h1DOM=<span class="built_in">document</span>.getElementById(<span class="string">"h1DOM"</span>);</span></span><br><span class="line"><span class="javascript">			<span class="keyword">var</span> inputDOM=<span class="built_in">document</span>.getElementById(<span class="string">"inputDOM"</span>);</span></span><br><span class="line">			h1DOM.innerHTML=msg;</span><br><span class="line">			inputDOM.value=msg;</span><br><span class="line"></span><br><span class="line"><span class="actionscript">			inputDOM.addEventListener(<span class="string">"input"</span>, <span class="function"><span class="keyword">function</span><span class="params">()</span></span>&#123;</span></span><br><span class="line"><span class="actionscript">				msg=<span class="keyword">this</span>.value;</span></span><br><span class="line">				h1DOM.innerHTML=msg;</span><br><span class="line">				inputDOM.value=msg;</span><br><span class="line">			&#125;)</span><br><span class="line">		&#125;</span><br><span class="line">	<span class="tag">&lt;/<span class="name">script</span>&gt;</span></span><br><span class="line"><span class="tag">&lt;/<span class="name">head</span>&gt;</span></span><br><span class="line"><span class="tag">&lt;<span class="name">body</span>&gt;</span></span><br><span class="line">	<span class="comment">&lt;!-- 视图模型 view --&gt;</span></span><br><span class="line">	<span class="tag">&lt;<span class="name">div</span>&gt;</span></span><br><span class="line">		<span class="tag">&lt;<span class="name">h1</span> <span class="attr">id</span>=<span class="string">"h1DOM"</span>&gt;</span><span class="tag">&lt;/<span class="name">h1</span>&gt;</span></span><br><span class="line">		<span class="tag">&lt;<span class="name">input</span> <span class="attr">type</span>=<span class="string">"text"</span> <span class="attr">value</span>=<span class="string">""</span> <span class="attr">id</span>=<span class="string">"inputDOM"</span>&gt;</span></span><br><span class="line">	<span class="tag">&lt;/<span class="name">div</span>&gt;</span></span><br><span class="line">	</span><br><span class="line"><span class="tag">&lt;/<span class="name">body</span>&gt;</span></span><br><span class="line"><span class="tag">&lt;/<span class="name">html</span>&gt;</span></span><br></pre></td></tr></table></figure>
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